"The Six Day Stilt rises from the dunes like a petrified kraken corpse, bearing down upon the vacant flats."
The Six-Day Stilt is a temple city near the north-western corner of the world map. It appears to be a location of major importance for the Mechanimists. The Stilt consists of a central cathedral and the Stiltgrounds, which surrounds the cathedral.
Sheba Hagadias can be found just inside cathedral's entrance. She accepts book donations, and grants a small amount of experience in return. Rarer, more expensive books grant larger experience rewards when donated, but the reward is always fairly modest. Only one copy of each book will be accepted.
Visiting the Stilt can be very worthwhile for a character with the Offer Gift skill, as sharing water with the High Priest of the Stilt inside the cathedral by the Sacred Well will grant almost enough reputation to make all Mechanimists friendly from that point on. Characters can also cast artifacts into the Sacred Well (by "talking" to it - the Mechanimists do not appreciate it when visitors throw grenades at the Well) to gain the faction's favour, albeit at a much slower rate. Though it may take some effort, befriending the Mechanimists in this way makes the last floor of one of the storyline's harder dungeons quite a bit less painful.
Note that virtually any kind of creature can appear around the Stiltgrounds as a Mechanimist convert, including monsters which spawn minions or duplicates of themselves. These spawns will not be affiliated with the Mechanimists or the Six-Day Stilt, and will be perfectly willing to pick fights with the player or any nearby NPCs.